package demo523;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class Update {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {

        Connection connection = SqlConnection.getCon();
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户id");
        int id = scanner.nextInt();
        System.out.println("请输入用户名");
        String username = scanner.next();

        String sql = "update users SET username = ? where id = ? ";

        PreparedStatement preparedStatement = connection.prepareStatement(sql);

        preparedStatement.setString(1, username);
        preparedStatement.setInt(2, id);

        int i = preparedStatement.executeUpdate();
        if (i > 0) {
            System.out.println("修改成功");
        } else {
            System.out.println("修改失败");
        }
    }
}
